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Finding the Fourth Proportional to 636.98, 879.67 and 568.22

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Solution

The fourth proportional to 636.98, 879.67 and 568.22 is: 784.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.98 : 879.67 = 568.22 : x
  2. Step 2: Convert to fraction form
    636.98/879.67 = 568.22/x
  3. Step 3: Cross multiply
    636.98x = 879.67 × 568.22
  4. Step 4: Simplify right side
    636.98x = 499,838.85
  5. Step 5: Solve for x
    x = 499,838.85/636.98
  6. Step 6: Final answer
    x = 784.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.